2026-04-23T15:39:29Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/140142026-01-29T08:37:10Zcom_20.500.11984_1143col_20.500.11984_1148

Martinez Ocaña, Iago Iannarelli, Iacopo Seri, Paolo Cavallini, Andrea 2026-01-16T07:59:28Z 2026-01-16T07:59:28Z 2025 979-8-3315-2074-8 2380-856X https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=200560 https://hdl.handle.net/20.500.11984/14014 This paper aims at presenting the technologies used in the electrical insulation of rotating machines dedicated to transport electrification. An analysis of the materials used in various insulation subsystems, the evaluations required for achieving a partial discharge-free design of hairpin machines, and the impact of cooling fluids will be discussed. The result presented here show that the most critical part is the phase-tophase insulation in the end-winding. The insulation thickness depends on the tolerances in conductor spacing. Cooling oil spayed on the end-windings can decrease the partial discharge inception voltage by about 10−15%. This factor should be considered in the design phase. eng © 2025 IEEE electrical machine Electrical Insulation Insulation Technologies for State-of-the-Art Electrical Machines Used in Transport Electrification